采用定向凝固工艺考察了Ce对低硫16Mn钢一次结晶的影响.结果表明,Ce作为溶质元素的合金化作用,使胞晶间距增大,二次枝晶臂间距变小,柱状晶区缩短,等轴晶粒细化,并使Mn的显微偏析减少.采用此工艺可以排除晶体固一液界面附近的夹杂物对凝固形貌的影响.
Directional solidification technique was used to determine the effect of Ce on the solidification structure of low-sulphur 16Mn steel: The results show that addition of Ce increases the primary dendrite arm spacing and decreases the secondary dendrite arm spacing, the width of Columnar region, the size of equiaxed grains and the degree, of micro-segregation of Mn. This technique is expected to be used to reduce the detrimental influence of impurity particles on solidification structures.
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